From their blog entry:
Here is your chance to let our project team members know who you are and which challenges you encounter when working with or using web standards.
WaSP deals with the client side standards of web, while OSCOM deals with the server side standards. Both are important for building scalable, accessible and enduring web solutions.
Bonus points to WaSP for providing Midgard as the second example of a content management system in the survey.